Fundamentals; Overview - 3Com MSR 50 Series Configuration Manual

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Overview

Fundamentals

V RADIUS C
OICE
Introduction to voice RADIUS
Remote access dial in user service (RADIUS) is a protocol standard developed for
implementing authentication, authorization and accounting (AAA) for access
users, who can be PPP users or voice users. The voice RADIUS function provided by
the voice gateway (RADIUS client) is suitable for small- and medium-sized network
operators or enterprises to control voice calls and perform voice call accounting
statistics.
As a whole, voice RADIUS is a part of the whole voice module that implements
AAA for voices users on the voice gateway. When a user initiates a voice call, the
voice gateway interacts with the user according to the configured parameters,
encapsulates the obtained user information and statistics into RADIUS AAA
messages, and sends the messages to the RADIUS server. The voice gateway then
determines whether to connect the call according to the response. After the call
ends, the voice gateway reports to the RADIUS server the statistics information
(such as call duration, number of messages, and number of bytes) about the call to
complete call accounting and other operations.
Voice RADIUS call process
Figure 698 shows the networking environment where voice RADIUS is applied.
Figure 698 Network diagram for voice RADIUS application
O- Gateway
1000
PBX
ONFIGURATION
RADIUS server
(4)
(2)
(1)
(3)
Internet
(6)
(1 ) Call Segment 1
(2 ) Call Segment 2
(3 ) Set up an IP voice channel
(4 ) Call Segment 3
(5 ) Call Segment 4
(6 ) Both parties start a conversation
(5)
T- Gateway
1001
PBX